Texas Instruments TL7759CDR

Overview

TL7759CDR from Texas Instruments is a precision supply-voltage supervisor IC designed for microcomputer and microprocessor system reset control. It provides true and complementary reset outputs (RESET and RESET), features a 4.55 V ±120 mV input threshold, operates across 1 V to 7 V supply range, draws only 20 µA standby current, and guarantees defined reset states when VCC exceeds 1 V - used in embedded power-up sequencing and undervoltage protection circuits.

For engineers reviewing the TL7759CDR datasheet, TL7759CDR pinout, TL7759CDR application, or TL7759CDR equivalent, this page delivers verified technical context, exact SOIC-8 package mapping, confirmed timing parameters (tPLH/tPHL ≤ 5 µs), real-world use scenarios, and two validated alternative parts with documented functional and application-level differences.

Technical Context

The TL7759CDR implements a precision bandgap-referenced comparator with hysteresis (30–70 mV) to detect negative-going VCC drops below 4.4 V–4.7 V (VIT–). Its internal circuitry ensures reset assertion remains active until VCC recovers above VIT+, enabling reliable power-on and brownout recovery.

It delivers dual open-collector outputs: RESET (active-low) and RESET (active-high), both specified for 24 mA sink and –8 mA source capability at VCC = 4.3 V. The device remains fully functional down to 1 V supply and defines output states before VCC reaches 1 V, eliminating undefined startup behavior.

Key Specifications

Pinout & Package

TL7759CDR is housed in an 8-pin SOIC (D) package per JEDEC MS-012, variation AA, with 1.27 mm lead pitch, 3.91 mm body width, and 4.90 mm body length. Pin 1 is located in Quadrant Q1 per tape-and-reel orientation standards.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar supply-voltage supervisor applications.

Compared with TL7759CDR, TPS3808G01DBVR offers superior power efficiency but sacrifices dual-output flexibility and sub-microsecond timing; MAX691CPD+ extends functionality with watchdog and manual reset yet constrains supply compatibility to 5 V systems - TL7759CDR remains optimal for cost-sensitive, dual-polarity reset needs in 1–7 V designs.

Availability

TL7759CDR is available at Aetrix Electronics and suitable for industrial PLC power sequencing, embedded microcontroller reset, automotive body control modules, and medical diagnostic equipment requiring stable component supply and guaranteed long-term sourcing.

Supply support for TL7759CDR includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Texas Instruments is a global semiconductor leader delivering analog, embedded processing, and connectivity solutions with emphasis on reliability, longevity, and industrial-grade qualification.

The TL7759 series belongs to TI's legacy supply-voltage supervisor product line, engineered specifically for robust, low-cost reset generation in microcomputer and microprocessor systems operating across wide voltage and temperature ranges.

FAQ

What is the exact package type and lead count for TL7759CDR?

The TL7759CDR is packaged in an 8-pin SOIC (Small Outline Integrated Circuit) package designated as D package per TI's packaging nomenclature. It has a 1.27 mm lead pitch, 3.91 mm body width, and conforms to JEDEC MS-012, variation AA. The "R" suffix indicates tape-and-reel packaging with 2500 units per reel.

Does TL7759CDR provide both active-high and active-low reset outputs?

Yes, TL7759CDR provides true and complementary reset outputs: RESET (pin 5) is active-low open-collector, and RESET (pin 6) is active-high open-collector. Both outputs are asserted simultaneously during undervoltage events, enabling direct interface with logic families requiring either polarity without external inversion.

What is the minimum supply voltage at which TL7759CDR guarantees defined reset output states?

TL7759CDR guarantees defined reset output states when VCC exceeds 1 V. Below 1 V, outputs enter an undefined state per datasheet specification - however, the device remains powered and functional down to 1 V, and outputs transition cleanly into their active states as VCC rises past the 4.4–4.7 V threshold window.

Can TL7759CDR operate reliably with a 3.3 V supply rail?

Yes, TL7759CDR operates reliably across 1 V to 7 V, including 3.3 V nominal supplies. Its 4.4–4.7 V input threshold ensures it will assert reset if the 3.3 V rail collapses significantly (e.g., below ~3.1 V under load), making it suitable for brownout detection in 3.3 V systems when used with appropriate decoupling and layout.

Is TL7759CDR pin-compatible with other members of the TL77xx family such as TL7705 or TL7709?

No, TL7759CDR is not pin-compatible with TL7705 or TL7709. While all share the same SOIC-8 footprint, their pin functions differ: TL7759CDR uses pins 2, 3, 7, and 8 as NC, whereas TL7705/TL7709 assign those pins to threshold adjust or manual reset. Substituting without schematic and layout review will result in incorrect operation.